My Father Showed Me How to Masturbate

So I started masturbating when I was about One time I was talking to my dad about—I was going through puberty so we talked about sex and body changes a lot around this time—and he told me about how he liked to masturbate by externally stimulating his prostate. I thought it sounded cool and so I asked him to show me how he did it. He only did it for a few seconds just to show me where it was. This was, more or less, the only contact we had that could be interpreted as sexual. We talked about everything, pretty much, and physical affection was normal, too.